hoskins



(No Model.) 2 Sheets-Sheet 1.

G. J. & O. H. HOSKINS. MACHINE FOR GALKING SEAMS AND JOINTS (JP-STEAM BOILERS.

No. 449,286. Patented Mar. 31,1891.

J52 venZvrJx 2 Sheets-Sheet 2..

(No Model.)

G. J. & 0. H'. HOSKINS. MACHINE FOR OALKING SEAMS AND JOINTS OFSTEAM BOILERS.

Patented Mar. 31, 1891.

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UNITED STATES PATENT OFFICE.

GEORGE J. HOSKINS AND CHARLES H. HOSKINS, OF SYDNEY, NEW SOUTH WALES.

MACHINE FOR CALKING SEAMS AND JOINTS 0F STEAM-BOILERS.

SPECIFICATION forming part of Letters Patent No. 449,286, dated March 31, 1891.

Application filed October 13,1890. Serial No. 367,894- (No model.) Patented in New South Wales August 29, 1889, No. 1,699, and in England April 28, 1890, No. 6,499.

1'0 all whom it may concern.-

Be it known that we, GEORGE JOHN HOS- KINs and CHARLES HENRY HosKINs, subjects of the Queen of Great Britain and Ireland, and residents of Sydney, in the county of Cumberland and Colony of New South WVales,

Australia, have invented 'an Improved Machine for CalkingSeams and Joints in Steam- Boilers and other Analogous Constructions, (patented in New South Wales August 29, 1889, No. 1,699, and in Great Britain April 28, 1890, No. 6,499,) of which the following aspecification.

The machine that forms the subject of the present application for Letters Patent is carried by an upright standard that is firmly bolted to a permanent frame that may be placed in any suitable position in the workshop. The standard supports a horizontal adjustable arm or bracket that may be raised or lowered by any suitable mechanical means. The horizontal arm or bracket terminates in a strap-socket constructed so as to carry a hollow vertical'shaft or spindle. The strap may be tightened on the spindle in any suitable manner, so as to prevent the spindle from turning in the socket. The hollow vertical shaft or spindle acts as part of the steampipe, its upper and lower ends being tapped to receive the steam connections. To the lower end of the vertical shaft or spindle is attached a curved arm of peculiar form. The end of the curved arm most remote from the vertical spindle turns downward and terminates in a socket or sleeve into which is introduced a horizontal pivot-pin, to which is secured another sleeve, the pivot-pin and second sleeve forming a T-piece. Through the sleeve of the T-piece is passed a trunnion or rocking shaft, to one end of which is secured a counterbalance-weight, while the other end carries a steam-cylinder, the steam-cylinder and the rocking shaft to which it is attached being preferably one casting. On the upper side of the steam-cylinder is placed the valvegear, throttle-valve, and exhaust. The cylinder and its adjuncts, the piston and pistonrod, form a steam-hammer. Attached to the forward end of the steam-cylinder is a solid arm that carries a small auxiliary steam-cylinder. To the forward end of the piston-rod of the auxiliary steam-cylinder is secured a lever-arm that carries the calking-tool, the auxiliary steam-cylinder serving as a steamspring to keep the tool up against its work, as will be hereinafter more particularly explained. Steam is supplied to the steamhammer and its auxiliary, the steam-spring, by means of a flexible steam-pipe connected to the lower connection on the vertical shaft or spindle. Secured to the side of the steamhammer cylinder is a handle, by means of which the attendant is enabled to manipulate the steam-hammer. The boiler or other construction the seams or joints of which are to be calked is carried by anti-friction rollers placed on a suitable frame below the boiler. Stop-rollers are placed below the central axis of the boiler or other work to receive the thrust due to the blow of the hammer.

In the accompanying drawings, Figure 1 is a plan of the whole apparatus. Fig. 2 is a front elevation of the same, the manipulating-handle attached to the hammer-cylinder being removed. Fig. 3 is an end elevation of the apparatus, but with the hammer raised to a horizontal position clear of the work and the throttle-valve and flexible steam-pipe removed for the purpose of exhibiting to better advantage the hollow vertical spindle and its connection with the curved arm. Fig. 4. is a detail plan view of the lever-arm that carries the calking-tool and its connection to the piston-rod of the steam-spring. Fig. 5 is a vertical section of the calking-tool on the line 1 2 of Fig. 4. Fig. 6 is a vertical section of the extremity of the curved arm and sleeve and the sleeved T-piece in position. Fig. 7 is a horizontal section on the line 3 4. of Fig. 6. 1

A is the standard that carries the whole apparatus. The form of standard shownin the drawings need not be strictly adhered to. Its shape may be varied according to the nature and class of work the tool maybe called upon to perform.

B is the horizontal arm carried by the stand ard A, the arm being capable of adjustment to the height of the work by the screw a. The horizontal arm B terminates in the strapsocket C, the tightening of which on the hollow vertical spindle D may be eltected'by the tightening-bolt b. The object of the tightening strap-bolt b is to prevent any rotary movement of the vertical hollow spindle D while the hammer is at work. tions 0 and d are tapped into the upper and lower extremities of the spindle D, the connection 0 leading to the steam-boiler and the connection (1 to the steam-hammer.

E is the curved arm attached to the lower end of the spindle D. The end of the curved arm E most remote from the spindle D turns downward and terminates in a sleeve or socket F. (See particularly Figs. 1 and 6.) Inserted into the sleeve F is a pivot-pin e, at one end of which is a second sleeve G at right angles to the sleeve F. The pivot-pin e is retained within the sleeve F (in which it is free to revolve in a vertical plane) by means of a collar and set-screw f. (See Fig. 7.) A trunnion or rocking shaft I'I passes through the sleeve G and is kept in position bya collar and setscrews g. One end of the trunnion H is counterbalanced by an adjustable weight h, while the other end carries the hammer-cylinder J, the trunnion and cylinder being preferably constructed in one piece. On the upper side of the hammer-cylinder (see particularly Fig. 2) is placed the valve-gear and throttle-valve i and 2" and exhaust j. In Fig. 3 the throttlevalve t" and flexible steam-supply pipe K are removed, as before mentioned. The pistonrod working in the hammer cylinder terminates in a hammer-head 70. Referring now to Fig. 1, it will be seen that the hammer-cylinder J carries a solid arm Z, supporting a small auxiliary steam-cylinder M, acting as a steam-spring. The valve in" the auxiliary steam-cylinder M is replaced by a four-way cock on, through which steam is admitted to the cylinder at either end, as required. Steam is supplied to the cylinder M through a small supply-pipe L. To the outer extremity of the piston-rod n of the auxiliary cylinder M is secured a lever-arm N. At that part of the lever-arm N opposite the central axis of the hammer-cylinder J is a conical socket 0, into which the calking-tool O fits. (See Fig. 4.) A handle P is secured to the hammer-cylinder, so as to enable the attendant to turn the cylinder J on its trunnion or axis H and manipulate it generally. The boiler or pipe Q that is being operated upon is supported and is free to revolve upon anti-friction rollersp. (See Figs. 2 and 3.) The boiler is prevented from receding under the blows of the hammer by stop-rollers q, that receive the thrust.

By means of the vertical spindle D the curved arm E, that carries the hammer, is enabled to revolve in a horizontal plane, and is secured in any desired position by the locking-strap O. The sleeve F, at the end of the curved arm E, enables the steam-hammer and its appurtenances to be moved or rotated in a The steam connecvertical planefand thepivoted sleeve G permits the same parts'to be moved or rotated in a second vertical plane at right angles to the firstmention ed vertical plan e. It will thus be seen that this system of articulation forms a universal joint, permitting of the most varied motions being imparted to the hammer and its adj uncts. In order to start on the job illustrated in the drawings, the hammer is brought round into the position shown in Fig. 3. The attendant then, by means of the handle P,-depresses the hammer into the position shown in Fig. 2. The lever-arm N, that carries the calking-tool, is then depressed until the calkingtool 0 is in contact with the surface of the work. Steam is then admitted behind the piston in the steam-spring by turning the four-way cook. The calking -tool is thus forced against and kept close up to the seam or joint it is intended to calk. Steam is thus admitted to the hammercylinder, causing repeated blows to be struck on the calkingtool. The joint or seam that is being calked is caused to travel slowly (by any suitable mechanical appliance) as the calking proceeds.

It is well particularly to remark that whatever position the tool may occupy around its central vertical axis the point of the calkingtool will impinge against that central vertical axis.

Having now particularly described and ascertained the nature of our said invention and in what manner the same is to be performed, we declare that what we claim is- 1. In machines for calking seams of boilers and other similar constructions, the arm E, which is capable of being moved in a horizontal plane around a vertical axis and carrying at its free end the necessary hammering apparatus, as herein set forth, and for the purposes stated.

2. In machines for calking seams of boilers and other similar constructions, the combination of the sleeve F and the T-sleeve G, for the purpose of permitting the hammering-tool to be moved in two vertical planes at right angles to each other, as herein described and explained.

3. In machines for-calking seams of boilers and other similar constructions, the combination of the arm E with the two sleeves F and Gand the steam-hammer, as herein specified, and as illustrated in the drawings.

4. In machines for calking seams of boilers and other similar constructions, the combination of parts forming the steam-spring M, the same being attached to the, hammering apparatus for the purpose of keepingthe calking-tool in close contact with its work, as herein specified, and as shown in the drawings.

5. In machines for calking seams of boilers and other similar constructions, the combination of, a steam-hammer which is capable of being moved in horizontal and Vertical planes, as described, with a calking-tool, I In Witness whereof we have hereunto set as and for the purpose herein set forth. our hands in presence of two witnesses.

6. The general construction, arrangement, GEORGE J HOSKINS and combination of parts in our improved CHARLES H HOQKIN'S tool for calking scams or joints in steam-boilers or other analogous constructions, as here- Witnesses: in specified, as illustrated in the drawings, MANFIELD NEWTON, O. E. and for the purposes set forth. WM. D. MASSEY. 

